NEET Chemistry, physical to organic.

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Question 1

A 10.0 g mixture of sodium carbonate and sodium hydrogencarbonate is heated until its mass is constant. Only the hydrogencarbonate decomposes, 2 NaHCO₃ → Na₂CO₃ + H₂O + CO₂, and both gases escape, so the mass falls by 1.55 g. What is the percentage by mass of NaHCO₃ in the mixture? (Molar masses: NaHCO₃ 84, H₂O 18, CO₂ 44 g mol⁻¹.)

Twenty units, a quarter of NEET

Built for the Chemistry part of NEET (UG): all twenty units of the current NEET (UG) Chemistry syllabus, physical, inorganic and organic, at Class 11 and 12 level.

1. Some Basic Concepts in Chemistry

2. Atomic Structure

3. Chemical Bonding and Molecular Structure

4. Chemical Thermodynamics

5. Solutions

6. Equilibrium

7. Redox Reactions and Electrochemistry

8. Chemical Kinetics

9. Classification of Elements and Periodicity in Properties

10. p-Block Elements

11. d- and f-Block Elements

12. Coordination Compounds

13. Purification and Characterisation of Organic Compounds

14. Some Basic Principles of Organic Chemistry

15. Hydrocarbons

16. Organic Compounds Containing Halogens

17. Organic Compounds Containing Oxygen

18. Organic Compounds Containing Nitrogen

19. Biomolecules

20. Principles Related to Practical Chemistry

Subject	Questions	Marks
Physics	45 compulsory multiple-choice questions.	180 marks
Chemistry	45 compulsory multiple-choice questions.	180 marks
Biology (Botany and Zoology)	90 compulsory multiple-choice questions.	360 marks

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